100808 Shindong, “We’re Genius because we write our dance down”

shindong has tweeted an hour ago along with the picture above.
What exactly are those ‘figures’ and letters on the piece of paper?
Yes, that’s right! This is how the member of Super junior plan their dance Arrangement and Movement.

Because super junior is a group with so many members, it takes time and effort to plan while dancing so this ‘drawing’ is done before they start dancing!
There are initials on the paper , representing different members and arrows to show the direction.